Solution:Step 1: Identify rows in table1table1 has ids 1, 2, 3.Step 2: Identify rows in table2table2 has ids 2, 3, 4.Step 3: Find rows in table1 not in table2Only id 1 is in table1 but not in table2.Final Answer:1 -> Option AQuick Check:EXCEPT returns unique rows from first query not in second [OK]

[Solved] Given two tables:table1:id123table2:id234What is the result of:SELECT id FROM table1 EXCEPT SELECT id FROM table2; | SQL

SQL - Set Operations

Given two tables:
table1:
id
1
2
3

table2:
id
2
3
4

What is the result of:
SELECT id FROM table1 EXCEPT SELECT id FROM table2;

A1

B4

C2, 3

D1, 4

Step-by-Step Solution

Solution:

Step 1: Identify rows in table1
table1 has ids 1, 2, 3.
Step 2: Identify rows in table2
table2 has ids 2, 3, 4.
Step 3: Find rows in table1 not in table2
Only id 1 is in table1 but not in table2.
Final Answer:
1 -> Option A
Quick Check:
EXCEPT returns unique rows from first query not in second [OK]

Quick Trick: EXCEPT returns rows only in first table [OK]

Common Mistakes:

MISTAKES

Including rows from second table
Confusing EXCEPT with INTERSECT
Listing all unique ids from both tables

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More SQL Quizzes

Given two tables:

Step 1: Identify rows in table1

Step 2: Identify rows in table2

Step 3: Find rows in table1 not in table2

Final Answer:

Quick Check:

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